Deep-drawn conical plastic container and method of making

Abstract

During the deep drawing of a cup-shaped container from a plastic sheet, its wall is surrounded by a sleeve of cardboard material or the like which reinforces and insulates the container and can be used to carry decorations. The upper and lower edges of the sleeve are enclosed by radial protrusions of the plastic of the container so that they cannot come into contact with the moisture of a base surface. Positive engagement between sleeve and container is ensured and the sleeve supports the wall which can be made very thin.

What is claimed is: 
     
       1. A container, comprising: a deep-drawn plastic cup having a bottom portion, a main wall portion and a radially protruding top rim, said main wall portion being generally frustoconical and tapering upwardly and outwardly, having a thickness less than half of the thickness of the other portions and having a frustoconical top wall part tapering upwardly and inwardly and terminating at said radially protruding top rim, said top wall part being separated by an annular ridge from the remainder of said main wall portion;   a generally frustoconical sleeve surrounding said cup and within which said plastic cup is deep-drawn, said sleeve being formed from a material different from and not readily weldable to the plastic of said cup, said sleeve being shaped and dimensioned to surround, tightly engage and reinforce said main wall portion, said sleeve including a frustoconical top section tapering upwardly and inwardly with said top wall part of said plastic cup, and a frustoconical lower section tapering downwardly and inwardly with said main wall portion below said top wall part; and   said cup further including a radial outward protrusion around said bottom portion so that said sleeve is axially confined between said radial protrusion and said top rim so that the axially facing edges of said sleeve are covered thereby.   
     
     
       2. A container according to claim 1 wherein said sleeve is folded inwardly and upwardly at a bottom edge thereof forming a rounded bottom edge. 
     
     
       3. A container according to claim 1 wherein the lower edge of said sleeve includes an inwardly protruding bead contiguous with the cup. 
     
     
       4. A container according to claim 3 wherein said sleeve includes a generally axially extending overlapping seam forming a radial first shoulder and said cup is formed with a second shoulder conforming to and positively engaging said first shoulder.   
     
     
       5. A container according to claim 4 wherein said outward protrusion comprises a radially outward extending annular ridge supporting the bottom end of said sleeve. 
     
     
       6. A container according to claim 5 wherein said bottom portion includes a bottom wall upwardly recessed from the lowest extremity of said cup, a generally annular reinforcing portion surrounding said bottom wall, and a plurality of feet extending downwardly from said reinforcing portion to said lowest extremity of said cup. 
     
     
       7. A container according to claim 4 wherein said bottom portion includes a bottom wall upwardly recessed from the lowest extremity of said cup, a generally annular reinforcing portion surrounding said bottom wall, and a plurality of feet extending downwardly from said reinforcing portion to said lowest extremity of said cup. 
     
     
       8. A container according to claim 3 wherein said outward protrusion comprises a radially outwardly extending annular ridge supporting the bottom end of said sleeve. 
     
     
       9. A container according to claim 4 wherein said bottom portion includes a bottom wall upwardly recessed from the lowest extremity of said cup, a generally annular reinforcing portion surrounding said bottom wall, and a plurality of feet extending downwardly from said reinforcing portion to said lowest extremity of said cup. 
     
     
       10. A container according to claim 1 wherein said sleeve includes a generally axially extending overlapping seam forming a radial first shoulder and said cup is formed with a second shoulder conforming to and positively engaging said first shoulder.   
     
     
       11. A container according to claim 1 wherein said outward protrusion comprises a radially outwardly extending annular ridge supporting the bottom end of said sleeve. 
     
     
       12. A container according to claim 1 wherein said bottom portion includes a bottom wall upwardly recessed from the lowest extremity of said cup, a generally annular reinforcing portion surrounding said bottom wall, and a plurality of feet extending downwardly from said reinforcing portion to said lowest extremity of said cup. 
     
     
       13. A container, comprising: a deep-drawn plastic cup having a bottom portion, a main wall portion and a radially protruding top rim, said main wall portion having a thickness less than half of the thickness of the other portions, having a frustoconical top wall part tapering upwardly and inwardly, having a frustoconical lower part tapering downwardly and inwardly, and having an annular ridge between said top wall part and said lower part;   a sleeve surrounding and tightly engaging said cup, said sleeve being formed from a material different from and not readily weldable to the plastic of said cup, and including a frustoconical top section tapering upwardly and inwardly with said top wall part, a frustoconical lower section tapering downwardly and inwardly with said lower part and a projection between said top and lower sections conforming to said annular ridge; and   a radial outward protrusion around said bottom portion of said cup so that said sleeve is axially confined between said radial protrusion and said top rim and so that the axially facing edges of said sleeve are covered thereby.   
     
     
       14. A container according to claim 13 wherein said sleeve is folded inwardly and upwardly at a bottom edge thereof forming a rounded bottom edge.